Finding the Fourth Proportional to 2,456.48, 3,390.80 and 1,408.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.48 : 3,390.80 = 1,408.96 : x
2. Step 2: Convert to fraction form
   2,456.48/3,390.80 = 1,408.96/x
3. Step 3: Cross multiply
   2,456.48x = 3,390.80 × 1,408.96
4. Step 4: Simplify right side
   2,456.48x = 4,777,501.57
5. Step 5: Solve for x
   x = 4,777,501.57/2,456.48
6. Step 6: Final answer
   x = 1,944.86